With the development of national economy and urban construction, the amount of municipal solid waste in China is increasing year by year, and the demand of urban environmental quality is increasing, municipal solid waste (msw) has become one of the difficult problems in municipal construction.

Landfill leachate refers to the moisture contained in the garbage itself, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the overlying soil, and through the garbage layer and the overburden soil and formed a high concentration of wastewater, in the treatment process, the various stages of the application of instruments is very extensive, related to flow, pressure, liquid level, temperature, analytical instruments of measurement and control products.